[Discourse](http://www.discourse.org/) is an open-source discussion platform that can be used as a mailing list, discussion forum, or a long-form chat room. In this tutorial, we’ll install Discourse in an isolated environment using [Docker](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-18-04), a containerization application. Choose your operating system below to get started.